You do just what the word suggests, you use a jumper wire from the positive post of the battery to the clutch wire MOMENTARILY and see if the clutch clicks. DON'T do this for more than the time it takes to check the clutch.

I would not suggest doing this unless you UNDERSTAND the circuit and electrical troubleshooting procedures. It is not the END in your troubleshooting, it is only part of the MEANS to the end. You are checking the clutch and then you can go back through the circuit to methodically find the source of the problem if the clutch is good.

Good luck,